Comment 4 for bug 296684

Hello mathiasp,

go to terminal, login as root user(sudo su root)run this command in terminal:
dpkg-reconfigure locales
this will enlist the locales you have.

to generate your desired locale,
run,
locale-gen de_DE
 or
locale-gen en_US de_DE ( your desired locales separated by a space)

Try this.

Thanks.